WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [Xen-users] CoW works on Windows guest?

To: "Orathai Sukwong" <kobkob@xxxxxxxxx>
Subject: Re: [Xen-users] CoW works on Windows guest?
From: Dan Smith <danms@xxxxxxxxxx>
Date: Thu, 28 Sep 2006 17:08:34 -0700
Cc: Ryan Grimm <grimm@xxxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Thu, 28 Sep 2006 17:09:20 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <748f85310609281151q586a21b7if3a97e384f59eae9@xxxxxxxxxxxxxx> (Orathai Sukwong's message of "Thu, 28 Sep 2006 14:51:52 -0400")
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <748f85310609280723l49ca9725nf6a28fa234c1353f@xxxxxxxxxxxxxx> <m3psdf51av.fsf@xxxxxxxxxxxxxxxxxxxxxxxxxxx> <748f85310609281151q586a21b7if3a97e384f59eae9@xxxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux)
OS> My current dom0 was compiled from xen-3.0.2-2 source + dm
OS> patches. I cannot find the cowd daemon. I wonder if it is
OS> something I need to compile separately.

If you applied the dm-userspace patches to your xen tree and either
rebuilt and installed the whole tree, or at least the tools part, you
should have "dscow_tool" and "cowd" binaries on your system.  If you
don't see them, check in the tools/ directory of your tree

OS> Which device do you mean for the target device? Previously, my
OS> installation configuration file was like disk = ["file:/xenimages/
OS> windowsbase.img,ioemu:hda,w" ]. Then, I changed to disk =
OS> ["dmu:dscow:/tmp/
OS> windowsbase.dscow:/xenimages/windowsbase.img,ioemu:hda,w" ]. Is
OS> the /tmp/ windowsbase.dscow what you meant?

Do this:

  # dscow_tool -c /xenimages/windowsbase.dscow /xenimages/windowsbase.img

Which will create the cow file.  Then do:

  # cowd -p --sync=a dscow windowsbase /xenimages/windowsbase.dscow

Which will create a /dev/mapper/windowsbase device.  Any writes to
this device will be stored in the .dscow file; the .img file will
remain untouched.  Then, configure your domain to use the new device
with something like this:

  disk = [ '/dev/mapper/windowsbase,ioemu:hda,w' ]

(I'm not all that familiar with HVM config files, so adjust the above
line as appropriate)

Note that all the above assumes you have the dm-user.ko module
loaded.  If you built and installed Xen with the dm-userspace patches,
you should be able to just do:

  # modprobe dm-user

-- 
Dan Smith
IBM Linux Technology Center
Open Hypervisor Team
email: danms@xxxxxxxxxx

Attachment: pgpcSENsWIBdG.pgp
Description: PGP signature

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users